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    Cisco Overrides

    The VoIP Help Page Team·3 min read·Last updated: March 14, 2026

    This article provides a guide to customizing Cisco VoIP phones using device overrides, covering how to program line keys, memory keys, and configure various phone functions like BLF, speed dials, and call parking.

    Scope:

    It is possible to customize the behavior and appearance of Cisco devices using device overrides to program the line keys and memory keys. Some of the more commonly used overrides are listed on this page.

    Requirements:

    Access to Manager Portal or NDP

    Overrides

    Overrides require NO spacing before or after the equals (=) sign, and the value given must be in quotes.

    memorykey.1.line="1"

    Override Functions

    • cp = Call Pickup - Allows call pickup for a ringing extension.
    • blf = Busy Lamp Field
    • ext = Extension
    • fnc = Function
    • sd = Speed Dial
    • sub = Subscribe to

    Time Setting

    Replace the "-08:00" with the hours offset from GMT for your desired timezone.

    Primary_NTP_Server="nist.time.gov"
Time_Zone="GMT-08:00"

    Extension Display Label

    To change the display extension name

    Station_Display_Name="Extension Name"
Station_Name="101"

    Unused Line Keys (Extended Function Keys)

    It is possible to use Unused Line Keys as BLF Keys. In the following example replace 204 with the appropriate Extension, and the Short Name "Sales" to the display name you prefer.

    BLF Button Two

    Extended_Function[2]="fnc=blf+sd;sub=204@$PROXY;ext=204@$PROXY"
Short_Name[2]="Sales"

    More BLF Buttons

    Extended_Function[3]="fnc=blf+sd;sub=205@$PROXY;ext=205@$PROXY"
Short_Name[3]="Billing"
Extended_Function[4]="fnc=blf+sd;sub=210@$PROXY;ext=210@$PROXY"
Short_Name[4]="Support"

    Attendant Console Keys

    Cisco refers to Side Car Keys as Attendant Console Keys.

    Unit_1_Key_10=""
Unit_1_Key_11=""
Unit_1_Key_12=""
Unit_1_Key_13=""
Unit_1_Key_14=""
Unit_1_Key_15=""
Unit_1_Key_16=""
Unit_1_Key_17=""
Unit_1_Key_18=""
Unit_1_Key_19=""
Unit_1_Key_20=""
Unit_1_Key_21=""
Unit_1_Key_22=""
Unit_1_Key_23=""
Unit_1_Key_24=""
Unit_1_Key_25=""

    Changing Star Codes to Pound Codes

    Call_Return_Code="#69"
Blind_Transfer_Code="#98"
Call_Back_Act_Code="#66"
Call_Back_Deact_Code="#86"
Cfwd_All_Act_Code="#72"
Cfwd_All_Deact_Code="#73"
Cfwd_Busy_Act_Code="#90"
Cfwd_Busy_Deact_Code="#91"
Cfwd_No_Ans_Act_Code="#92"
Cfwd_No_Ans_Deact_Code="#93"
CW_Act_Code="#56"
CW_Deact_Code="#57"
CW_Per_Call_Act_Code="#71"
CW_Per_Call_Deact_Code="#70"
Block_CID_Act_Code="#67"
Block_CID_Deact_Code="#68"
Block_CID_Per_Call_Act_Code="#81"
Block_CID_Per_Call_Deact_Code="#82"
Block_ANC_Act_Code="#77"
Block_ANC_Deact_Code="#87"
DND_Act_Code="#78"
DND_Deact_Code="#79"
Secure_All_Call_Act_Code="#16"
Secure_No_Call_Act_Code="#17"
Secure_One_Call_Act_Code="#18"
Secure_One_Call_Deact_Code="#19"
Paging_Code="#96"
Call_Park_Code="#38"
Call_Pickup_Code="#55"
Call_UnPark_Code="#39"
Group_Call_Pickup_Code="#37"
Media_Loopback_Code="#03"

    BLF Key Functions

    BLF Buttons require blf+sd (without the 'sd' - the button will only monitor the extension). Replace 100 with your desired extension.

    fnc=blf+sd;sub=100@$PROXY;ext=100@$PROXY

    Group Paging

    Group_Paging_Script="pggrp=224.168.168.168:34560;name=All;num=0;listen=yes;"

    Speed Dial

    External Speed Dials only require the 'sd' function. Change 8662905901 to the destination of your choice.

    fnc=sd;sub=8662905901@$PROXY;ext=8662905901@$PROXY

    Call Parking

    Call parking with Cisco SPA phones requires multiple buttons to park a call. Below are steps to setup Call Park using multiple buttons. Please note these keys can be programmed as Soft Keys, or Side Car Keys.

    To Monitor a Call Park Queue, set up a BLF targeting the Queue, in this example Park 701.

    Park BLF

    Extended_Function[3]="fnc=blf+sd;sub=701@$PROXY;ext=701@$PROXY"
Short_Name[3]="Park Mon"

    Add Blind Transfer to Active Call Soft Buttons

    Add Blind Transfer Soft Key
    Programmable_Softkey_Enable="Yes"
Connected_Key_List="hold|1;conf|2;xfer|3;bxfer|4;toggle;confLx;xferLx;park;phold;flash;"

    Add Speed Dial to Answer Park

    Parked Call Retrieve

    Extended_Function[4]="fnc=sd;ext=*55701"
Short_Name[4]="Park Pickup"

    To park an active call with the above settings, while on a call Press the bxfer button, then press the Park Mon button you setup. To retrieve the parked call, press the Park Pickup button.

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